169 строки
4.9 KiB
C++
169 строки
4.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Netscape Communications Corporation.
|
|
* Portions created by the Initial Developer are Copyright (C) 1998
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either of the GNU General Public License Version 2 or later (the "GPL"),
|
|
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
#include "nsSplittableFrame.h"
|
|
#include "nsIContent.h"
|
|
#include "nsPresContext.h"
|
|
#include "nsStyleContext.h"
|
|
|
|
NS_IMETHODIMP
|
|
nsSplittableFrame::Init(nsPresContext* aPresContext,
|
|
nsIContent* aContent,
|
|
nsIFrame* aParent,
|
|
nsStyleContext* aContext,
|
|
nsIFrame* aPrevInFlow)
|
|
{
|
|
nsresult rv;
|
|
|
|
rv = nsFrame::Init(aPresContext, aContent, aParent, aContext, aPrevInFlow);
|
|
|
|
if (aPrevInFlow) {
|
|
// Hook the frame into the flow
|
|
mPrevInFlow = aPrevInFlow;
|
|
aPrevInFlow->SetNextInFlow(this);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsSplittableFrame::Destroy(nsPresContext* aPresContext)
|
|
{
|
|
// Disconnect from the flow list
|
|
if (mPrevInFlow || mNextInFlow) {
|
|
RemoveFromFlow(this);
|
|
}
|
|
|
|
// Let the base class destroy the frame
|
|
return nsFrame::Destroy(aPresContext);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsSplittableFrame::IsSplittable(nsSplittableType& aIsSplittable) const
|
|
{
|
|
aIsSplittable = NS_FRAME_SPLITTABLE;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsIFrame* nsSplittableFrame::GetPrevInFlow() const
|
|
{
|
|
return mPrevInFlow;
|
|
}
|
|
|
|
NS_METHOD nsSplittableFrame::SetPrevInFlow(nsIFrame* aFrame)
|
|
{
|
|
mPrevInFlow = aFrame;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsIFrame* nsSplittableFrame::GetNextInFlow() const
|
|
{
|
|
return mNextInFlow;
|
|
}
|
|
|
|
NS_METHOD nsSplittableFrame::SetNextInFlow(nsIFrame* aFrame)
|
|
{
|
|
mNextInFlow = aFrame;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsIFrame* nsSplittableFrame::GetFirstInFlow() const
|
|
{
|
|
nsSplittableFrame* firstInFlow = (nsSplittableFrame*)this;
|
|
while (firstInFlow->mPrevInFlow) {
|
|
firstInFlow = (nsSplittableFrame*)firstInFlow->mPrevInFlow;
|
|
}
|
|
NS_POSTCONDITION(firstInFlow, "illegal state in flow chain.");
|
|
return firstInFlow;
|
|
}
|
|
|
|
nsIFrame* nsSplittableFrame::GetLastInFlow() const
|
|
{
|
|
nsSplittableFrame* lastInFlow = (nsSplittableFrame*)this;
|
|
while (lastInFlow->mNextInFlow) {
|
|
lastInFlow = (nsSplittableFrame*)lastInFlow->mNextInFlow;
|
|
}
|
|
NS_POSTCONDITION(lastInFlow, "illegal state in flow chain.");
|
|
return lastInFlow;
|
|
}
|
|
|
|
// Remove this frame from the flow. Connects prev in flow and next in flow
|
|
void
|
|
nsSplittableFrame::RemoveFromFlow(nsIFrame* aFrame)
|
|
{
|
|
nsIFrame* prevInFlow = aFrame->GetPrevInFlow();
|
|
nsIFrame* nextInFlow = aFrame->GetNextInFlow();
|
|
|
|
if (prevInFlow) {
|
|
prevInFlow->SetNextInFlow(nextInFlow);
|
|
}
|
|
|
|
if (nextInFlow) {
|
|
nextInFlow->SetPrevInFlow(prevInFlow);
|
|
}
|
|
|
|
aFrame->SetPrevInFlow(nsnull);
|
|
aFrame->SetNextInFlow(nsnull);
|
|
}
|
|
|
|
// Detach from previous frame in flow
|
|
void
|
|
nsSplittableFrame::BreakFromPrevFlow(nsIFrame* aFrame)
|
|
{
|
|
nsIFrame* prevInFlow = aFrame->GetPrevInFlow();
|
|
if (prevInFlow) {
|
|
prevInFlow->SetNextInFlow(nsnull);
|
|
aFrame->SetPrevInFlow(nsnull);
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
void
|
|
nsSplittableFrame::DumpBaseRegressionData(nsPresContext* aPresContext, FILE* out, PRInt32 aIndent, PRBool aIncludeStyleData)
|
|
{
|
|
nsFrame::DumpBaseRegressionData(aPresContext, out, aIndent, aIncludeStyleData);
|
|
if (nsnull != mNextInFlow) {
|
|
IndentBy(out, aIndent);
|
|
fprintf(out, "<next-in-flow va=\"%ld\"/>\n", PRUptrdiff(mNextInFlow));
|
|
}
|
|
if (nsnull != mPrevInFlow) {
|
|
IndentBy(out, aIndent);
|
|
fprintf(out, "<prev-in-flow va=\"%ld\"/>\n", PRUptrdiff(mPrevInFlow));
|
|
}
|
|
|
|
}
|
|
#endif
|